Ashley Williams scored a priceless winner as Swansea saw off Watford at the Liberty Stadium.

The Wales skipper chose the perfect time to pop up with his first goal of the season as he headed home Ki's cross during the first-half.

With new boss Francesco Guidolin in the stands, the hosts delivered a resolute display to secure a huge three points.

Watford meanwhile have now lost their last four games and will be nervously looking over their shoulders.

Here are five things we learned.

Will managerial decision pay off?

Watching on: Guidolin in the stands (Image: Stu Forster)

For years, ever since a close shave with dropping out of the League 13 years ago, Swansea had been a role model among well-run clubs.

From Brian Flynn to Kenny Jackett, Roberto Martinez, Paulo Sousa, Brendan Rodgers, Michael Laudrup and Garry Monk, the baton between managers could not have been passed more smoothly from Gareth Edwards to Phil Bennett in the great Welsh rugby half-back line.

What a dog's breakfast chairman Huw Jenkins has made of the succession this season: Sacking Monk and putting club legend Alan Curtis, part of the same coaching hierarchy, in charge was a recipe for trouble.

Now Francesco Guidolin and Gabriele Ambrosetti have been parachuted in, with executive powers on team selection, above Curtis and the pecking order has been trashed. Whether they have hit the panic button or switched to cruise altitude remains to be seen.

Here are five things we learned.

Watford can't go down - can they?

Chance: Jurado curls a shot narrowly wide (Image: Michael Steele)

After reaching 29 points by Boxing Day, everyone thought Watford were safe from the drop.

Even in defeat, they were unlucky against Tottenham and Manchester City either side of the New Year.

But their standards have dropped alarmingly since then, and they were disjointed again for long periods at the Liberty. It's not too late for them to get sucked into a relegation battle...